Yes, and no. Before you reach that 10,000 hours you may play or do anything with great result, or enough to ENJOY what you are doing. Once you enjoy it, you keep doing it and whether it is true or not (those 10,000 hours) you sooner or later will have those hours in your fingers... an at the same time ENJOYING, PLAYING, LEARNIG :) SO, let's do that: PLAY!